MOBILE TERMINAL ANTENNA COUPLING SIMULATION CIRCUIT

PROBLEM TO BE SOLVED: To provide a mobile terminal antenna coupling simulation circuit which has a general-purpose type of a 4×4 port, and can be formed in a simple structure, a small size, and in a low cost.SOLUTION: A mobile terminal antenna coupling simulation circuit comprises: terminal side ports 51a to 51d capable of being connected to an antenna connection terminal of a mobile terminal 1 with a cable ; test device side ports 52a to 52d capable of being connected to a signal terminal of a test device 10" with the cable; eight three-port type couplers 61 to 68 in total that are vertically inserted into between the test side ports corresponded to the terminal side ports two by two; and a four-port type coupler 70 connected between third ports of four three-port type coupler connected to the terminal side port of three-port type coupler. A test outgoing signal inputted to the test side port is outputted to the corresponded terminal side port. An incoming signal inputted to a specific terminal side port from a specific antenna connection terminal of a mobile terminal 1 is divided into four. One of the divided incoming signals is outputted to the test side port corresponded to the specific antenna connection terminal. The other thee divided income signals are outputted to three terminal side ports other than the specific terminal side port.SELECTED DRAWING: Figure 1 【課題】４×４ポートの汎用型で、簡易な構成で小型且つ安価に形成できるようにする。【解決手段】移動体端末１のアンテナ接続端子にケーブル接続可能な端末側ポート５１ａ〜５１ｄと、試験装置１０″の信号端子にケーブル接続可能な試験側ポート５２ａ〜５２ｄと、端末側ポートとそれに対応する試験側ポートの間にそれぞれ２つずつ縦列的に挿入された合計８つの３ポート型カプラ６１〜６８と、これら３ポート型カプラのうち端末側ポートに接続されている４つの３ポート型カプラの各第３ポート間に接続された４ポート型カプラ７０とを有し、試験側ポートに入力される試験用下り信号を対応する端末側ポートに出力させ、移動体端末１の特定のアンテナ接続端子から特定の端末側ポートに入力された上り信号を４等分し、その一つを特定のアンテナ接続端子に対応する試験側ポートに出力させ、別の３つを特定の端末側ポート以外の３つの端末側ポートに出力させる。【選択図】図１